There is no hope that a renegotiation would be anything but a step towards exit from the EU.

Do you see over yonder, friend Sancho, thirty or forty hulking giants? I intend to do battle with them and slay them.

Perhaps Cameron will not employ the very words used by Miguel de Cervantes (some on the nationalist right of his party will probably take issue with the quotation of foreign writers) but, if recent statements are anything to go by, that will be the sentiment expressed when talking about Europe. The PM is picking a whole host of fights with the EU, in most cases against everyone’s advice, just to satisfy his Europhobic backbenchers.

From the EU budget to justice and home affairs, from fiscal union to banking union the debate is framed in terms of threats rather than opportunities. In fact, the only time the word opportunity is utilised is when talking about using the process of reform in the EU as an opportunity to remove Britain from more and more chapters of European cooperation.

That’s where the illusion starts. This nebulous concept of renegotiating Britain’s membership of the EU is the biggest red herring in the North Sea. It is used to appease those at the right and extreme right who want full withdrawal from the EU. But it is doomed to fail on all counts.

On the one hand no “renegotiation” will ever be enough for those that want to see Britain abandon the EU. The more meat the PM throws at them the more he wets their blood-thirsty appetite. In fact, in this futile effort to appease them, the PM has been compromising the national interest. The December 2011 “veto” locked the UK out of the room where important decisions about the EU’s future are taken. And the mooted opt out for justice and home affairs measures has been criticised by the police and all those involved in the nation’s security as a massive mistake that will make the fight against terrorism, illegal immigration and organised crime even harder.

On the other hand, such “renegotiation” will not be accepted by Britain’s European partners. The Polish Foreign Minister, a Conservative himself, from a country which has traditionally been considered the UK’s ally, came all the way to Oxford to say as much (£). He expressed an exasperation echoed by most EU member states with the UK’s attitude when in Brussels. The perception among our EU partners is that there seems to be more interest in grandstanding for domestic political consumption than constructively engaging to address the challenges the EU as a whole is facing. Germany, which has always been keen to keep Britain at the core of the EU, is now changing tune, with MPs from both the ruling centre right CDU and the centre-left SPD currently in opposition, saying that there is very little will to accommodate Britain’s demands for a “renegotiation”, exactly because of the spoiled child attitude displayed by the PM at European Council meetings since he came in power.

But good will aside, Britain’s hand if such a renegotiation is ever to take place will be weakened by its relative size and trading relationship with the rest of the EU. Whereas about 50 per cent of our trade is done with our EU partners, only 10 per cent of their trade is done with Britain. You do the maths.

Furthermore, why would other EU member states allow Britain to excuse itself from Single Market rules but continue ripping the benefits of Single Market membership? What is to stop others from making similar requests for exemption from areas the UK considers important? Even if the political will was there, even if Britain had the diplomatic and commercial capital to invest in such renegotiation, any concessions would imply the start of the Single Market’s unravelling, which would cost British business and households dearly.

Not to mention that it sends the wrong message; the more the UK isolates itself, the more it tries to remove itself from areas of European co-operation, the less likely it is to be able to gain support to advance areas that are of interest to us.

So instead of picking pointless battles with imaginary enemies, instead of creating impossible to fulfil expectations, the PM and his Ministers should use the EU’s decision-making structures to build alliances with Britain’s EU partners. Rather than threatening opt-outs and vetoes, the best way for Britain to address the areas of Single Market law it wants renewed is to engage constructively with others in the Council of Minister in reviewing EU laws, improving them when necessary and removing them if they have achieved their objective or have reached their sell-by date.

Don Quixote was told by his humble servant Sancho, "Now look, your grace, what you see over there aren't giants, but windmills, and what seems to be arms are just their sails, that go around in the wind and turn the millstone." The hope is that someone will awake the PM and his Europhobic backbenchers to exactly the same fact.